Last Modified: 5/19/2009 Description: Windows XP Service Pack 3 (SP3) is an update to Windows XP that Windows XP SP3 contains a small number of new updates and should not significantly change the Windows XP experience. Security Update for Windows XP SP3 (KB4012598). Last Modified: 5/13/2017. Size: 665 KB Supported products: Windows XP. Supported languages: Arabic.